Erik Ruben Lundin (2 July 1904[1] – 5 December 1988) was a Swedish chess master.

In 1929, he took 2nd in Gothenburg (Nordic Chess Championship, Gideon Ståhlberg won), and took 3rd in Västerås.

[2] In 1931, Lundin tied for 1st-3rd with Salo Flohr and Gösta Stoltz in Gothenburg.

In 1938, he won in Kalmar, and tied for 2nd-3rd with Henrik Carlsson, behind Ståhlberg, in Örebro (Nordic-ch).

[3] During World War II, Lundin won at Gothenburg 1941 (Swedish Chess Championship).

[4] In 1942, he tied for 3rd-4th with Stoltz in Stockholm (Folke Ekström and Stig Lundholm won).

Over the course of his career, he won at least one game from such world class players as David Bronstein, Max Euwe, Reuben Fine, Salo Flohr, Rudolf Spielmann, and Miguel Najdorf.